One problem related to ignition switch has been reported for the 1998 Chevrolet Lumina. The most recently reported issues are listed below.
Both rear brake lights have failed and only the center high mounted lights are working. I replaced the bulbs but taht did not help so I did a little troubleshooting and found that the bulbs worked as they lit up when I used the signal lights, hazard lights, and head lights. I next tried replacing the turn signal/harzard flasher but this did not resolve the problem. I checked on the internet and found that several people have had this problem and the failure was caused by a faulty turn signal lever and that if this part was wiggled the lights would work again. I checked this on the car and flipped the high beams on and off a couple of times via the turn signal stalk and the brake lights started to work again. I find this extremely dangerous that a critical piece of safety equipment relies on something as trivial as a turn signal stalk. I have also heard that general motors has issuad a recall concerning this problem but that it was very narrowly confined and did not include this vehicle despite the fact that many people seem to have had this problem.